December Weather in Orillia, Canada

Last updated: June 18, 2025

In Orillia, Canada, the average temperature for December hovers around -3°C (26°F). Prepare for a chilly range, where temperatures can dip as low as -27°C (-16°F) and soar to a maximum of 16°C (62°F). Expect 81 mm (3.2 in) of precipitation spread over 15 days, accompanied by a high average humidity of 91%. Dress warmly and stay cozy!

December Temperature in Orillia

In December in Orillia, the average temperature is -3°C (26°F). Maximum temperatures can reach 16°C (62°F), while minimums can plummet to as low as -27°C (-16°F). Be prepared for a range of conditions and dress warmly if you're planning to travel during this time.

December Weather in Orillia: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Orillia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Orillia, December typically has an average temperature of -3°C (26°F), with highs reaching up to 16°C (62°F) and lows dropping to around -27°C (-16°F).

Data source: Temperature data for Orillia generated using information from the Copernicus Climate Change Service.

December Precipitation in Orillia

In Orillia in December, the precipitation amount is 81 mm (3.2 in) spread over the course of 15 days.

December Precipitation Trends in Orillia

The chart displays monthly precipitation patterns in Orillia, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Orillia, December typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 15 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Orillia

In Orillia in December humidity is 91%. With an average temperature of -3°C (26°F), this humidity feels like a biting chill that penetrates through your clothing, making travel uncomfortable and the air crisp with an eerie dampness that can quickly sap your energy.

December Average Humidity in Orillia

This chart illustrates the average monthly humidity levels in Orillia, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Orillia is approximately 91%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Orillia

In Orillia in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Orillia, you can visit Hourly UV Index in Orillia.

Maximum UV Index Levels in Orillia for December

The chart shows the monthly maximum UV Index (UVI) for Orillia in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Orillia typically reaches 2, which falls under the low exposure category.

Data source: Orillia December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Orillia Compares to Other Months

Weather in Orillia varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Orillia, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Orillia, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	64 mm (2.5 inches)	93%	low
February Weather	-6°C (22°F)	70 mm (2.7 inches)	94%	moderate
March Weather	-2°C (29°F)	66 mm (2.6 inches)	87%	moderate
April Weather	5°C (41°F)	110 mm (4.3 inches)	82%	very high
May Weather	13°C (55°F)	94 mm (3.7 inches)	74%	very high
June Weather	18°C (65°F)	103 mm (4.1 inches)	68%	very high
July Weather	21°C (71°F)	109 mm (4.3 inches)	67%	very high
August Weather	20°C (69°F)	122 mm (4.8 inches)	67%	very high
September Weather	16°C (61°F)	86 mm (3.4 inches)	74%	high
October Weather	10°C (50°F)	113 mm (4.4 inches)	83%	moderate
November Weather	2°C (36°F)	88 mm (3.5 inches)	89%	moderate
December Weather	-3°C (26°F)	81 mm (3.2 inches)	91%	low